BoilerFaultCodesBaxi 3 flashes red Fault Code
Also written as 3FLASHESRED — same fault.
The Baxi 3 flashes red fault code means: your boiler is failing to light the gas or cannot stay lit, which means your heating and hot water have stopped working.. It appears on 4 Baxi models in our database.
Technical description: Ignition fault: No ignition, No flame detected following ignition, False flame signal detected, Repeated loss of flame detected
DIY fix possible
Check if other gas appliances, like a cooker, are working to confirm gas supply is activeCheck that your credit meter has not run out of fundsPress and hold the reset button for five seconds
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Baxi models that show the 3 flashes red fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi 3 flashes red fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.
- Baxi 613 Heat manual (PDF)
- Baxi 800 Heat (range) manual (PDF)
- Baxi EcoBlue Advance Heat manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026